const number = 123456.789;console.log(new Intl.NumberFormat('de-DE', { style: 'currency', currency: 'EUR' }).format(number)); 
// Expected output: "123.456,79 €"// The Japanese yen doesn't use a minor unit 
console.log(new Intl.NumberFormat('ja-JP', { style: 'currency', currency: 'JPY' }).format(number)); 
// Expected output: "￥123,457"// Limit to three significant digits 
console.log(new Intl.NumberFormat('en-IN', { maximumSignificantDigits: 3 }).format(number)); 
// Expected output: "1,23,000"

1. Identify early problems

irb> array = [1, 2, 3]  
=> [1, 2, 3] 
irb> array.cycle(3).to_a  
=> [1, 2, 3, 1, 2, 3, 1, 2, 3] 

irb> button = ['on', 'off'].cycle  
=> # 
irb> button.next  
=> "on" 
irb> button.next  
=> "off" 

// Start the timer 
console.time('myTimer');// Simulate a time-consuming operation 
for (let i = 0; i < 1000000; i++) { 
 // Some code here 
}// Stop the timer and display the elapsed time in milliseconds 
console.timeEnd('myTimer');

-- set a global variable 
SET my_var = 42;-- use the global variable 
SELECT * FROM my_table WHERE column = my_var;-- unset the global variable 
RESET my_var; 

-- Let's say we update some data in a table. 
UPDATE my_table SET column1 = 'new_value' WHERE id = 42;-- Now, we want to know how many rows got changed and if there's a unique ID for the last row. 
GET DIAGNOSTICS rows_affected = ROW_COUNT, last_oid = RESULT_OID;-- We can print these values to see what happened. 
RAISE NOTICE 'Rows affected: %, Last OID: %', rows_affected, last_oid; 

CREATE OR REPLACE FUNCTION example_function() RETURNS void AS $$ 
BEGIN 
 -- Some code here 
 
 -- Raise a notice message 
 RAISE NOTICE 'This is a notice message: %', 'Additional data'; 
 
 -- More code here 
END; 
$$ LANGUAGE plpgsql; 

One
Two
Three
Four

.css-not-selector-shortcut { 
 display: flex; 
}

ul { 
 padding-left: 0; 
}

li { 
 list-style-type: none; 
 margin: 0; 
 padding: 0 0.75rem; 
}

li:not(:last-child) { 
 border-right: 2px solid #d2d5e4; 
}

Did you know that in Ruby 3.1.3 and prior some regexps could take a long time to process?

Don't believe me? Try running this in a 3.1.3 irb console:

`/^a*b?a*$/ =~ "a" * 50000 + "x"`

Your system will halt for like 10 seconds before returning no matches. This is the basis for ReDoS (Regexp Denial of Service) attacks.

Thankfully, Ruby 3.2.0 has fixed this and the same regexp gets resolved in 0.003 seconds. They also added a `Regex.timeout` global option which would prevent your app from falling victim to ReDoS attacks!